OPERATION. A.O. Smith RPVR-80E, *2**-120-E5 series, *P**-80-E5 series, R2VR-180E, R4MR-320E, *P**-55-E5 series, *4**-280-E5 series, RPVR-30K, *4**-280-X5 series, *4**-320-E5 series

OPERATION

Water Temperature

Adjustment

WARNING

Scalding Risk

This water heater can make water hot enough to cause severe burns instantly, resulting in severe injury or death. Before a emp ng to adjust the temperature set point, read “RISKS DURING

OPERATION” on page 3. If the instruc ons are not clear, contact a quali fi ed service technician.

To adjust your temperature se ng, refer to one of the following procedures.

Point -of-use models only:

To adjust the temperature setting, turn the temperature adjustment knob as described below. This knob can be found at the top of the circuit board next to the plumbing connec-

ons. (Figure 6.)

The factory se ng is approximately

105°F (+/-1°F).

• To decrease the set temperature, turn the knob to the left (counter clockwise).

• To increase the set temperature, turn the knob to the right

(clockwise).

• Use a small flat blade screwdriver to turn the knob.

The water temperature set point can be adjusted within a range of 90°F

(32C) and 140°F (60 °C).

Two- or four-chamber models only:

The water temperature set point can be adjusted within a range of 90°F

(32C) and 140°F (60 °C).

To change the set temperature,

1. Press and release either the

UP or DOWN button (Figure 7, page 16). The display will blink and allow you to adjust the temperature set point.

2. Press and hold the UP or

DOWN button to scroll through the temperatures quickly.

Single presses will adjust the temperature setting one degree at a time.

3. Press the ENTER button to confirm.

Continued on the next page...

Figure 6.

POINT-OF-USE MODELS ONLY:

TEMPERATURE ADJUSTMENT KNOB ON INTERNAL CIRCUIT BOARD

PLUMBING CONNECTIONS

BEHIND CIRCUIT BOARD

TEMPERATURE ADJUSTMENT KNOB

• DECREASE SET TEMPERATURE:

TURN KNOB TOWARD LEFT

(COUNTER-CLOCKWISE )

• INCREASE SET TEMPERATURE:

TURN KNOB TOWARD RIGHT

(CLOCKWISE )

• USE A SMALL FLAT BLADE

SCREWDRIVER.

Electric Tankless Water Heater • 15

To toggle between Fahrenheit and

Celsius,

1. Press and hold the DOWN button for five seconds. See Figure 7.

2. The or °C LED will illuminate, and the 7-segment LED will display the temperature set point in the appropriate units.

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Figure 7 .

Two and Four Chamber Models Only:

ENTER

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°F or °C

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16 • Electric Tankless Water Heater